Formula 1 teams have brought a combined 21 upgrades to Spa as the relentless development of the new 2026 cars continues.
Ferrari, unusually for the 2026 season, and Aston Martin, very typically for the 2026 season, are the only teams not to bring upgrades.
Mercedes has an interesting tweak to keep an eye on, while the midfield-leading Racing Bulls might have the most intriguing package to view, and Haas has a very unusual-looking development.
Starting at the front with Mercedes, it’s brought a tweaked front wing endplate with increased top-edge camber, with the aim of improving airflow to the rear of the car.
Cadillac has also made a similar change - but has also revised the footplate surfaces and added the typical horizontal vane that sticks out from the endplate - to its front wing, the team’s sole change here.
Back to Mercedes, it has also tweaked its rear drum winglets to help those work in a wider performance window, and it's one of many teams to make a Spa-specific rear-wing change to reduce downforce and drag for Spa’s long straights.
All four of the Racing Bulls tweaks are not labelled as circuit-specific. These include modified sidepod bodywork, a revision to its bulbous roll hoop inlet, front brake drum changes for airflow purposes and a new upper rear wing assembly. The latter is aimed at improving the efficiency of downforce on the car.
Two of Haas’s four changes are also not labelled as circuit-specific.
The front wing gets a revised endplate, pylon geometry and changes to the actual profile of the wing are all aimed at improving downforce efficiency across its operating window.
It's a very unusual-looking upgrade with an intricate design where the nose meets the wing assembly, with a sort of J-shaped assembly that rival teams will surely be looking to investigate, as it looks like a unique development as far as these rules go.
A geometry change to the deflector on the front end is also available, and a lower downforce rear wing, which are both aimed at Spa.
Haas appears to have removed the exhaust wing tip cover.
Williams has a rear brake duct winglet tweak and a trim for the floor, which are both Spa-specific, but it has also altered the floor profile generally, adding volume to the central part of the diffuser.
We already knew McLaren would have a new rear wing assembly to try at this race, and it has also made a revision to the endplate to improve airflow.
Audi has tweaked a diffuser winglet as part of what it calls an “ongoing aerodynamic development programme”. It also has the customary Spa rear wing tweaks.
That leaves Alpine, Cadillac and Red Bull with one update apiece.
Red Bull had already confirmed its ‘Macarena’ wing would be dropped for this event. It has also revised the pylons to extract more load.
Alpine is the only team to make a halo change, adding a winglet to improve airflow to the rear of the car.
Number of declared changes
Haas 4
Racing Bulls 4
Mercedes 3
Williams 3
Audi 2
McLaren 2
Alpine 1
Cadillac 1
Red Bull 1
Ferrari 0
Aston Martin 0
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